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Advent calendar 2015
8 December
All 2015 advent puzzles
~
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What is the largest number of factors which a number less than a million has?
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720720 has 240 factors.
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Most recent collections
Advent calendar 2025
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List of all puzzles
Tags
regular shapes
integration
star numbers
division
sum to infinity
irreducible numbers
grids
axes
books
multiplaction squares
cube numbers
powers
determinants
integers
digital products
probability
hexagons
calculus
shape
quadrilaterals
albgebra
probabilty
volume
crossnumbers
numbers
coordinates
gerrymandering
pentagons
percentages
symmetry
tangents
multiples
multiplication
lines
addition
cryptic clues
speed
combinatorics
rugby
money
square roots
polynomials
area
coins
expansions
floors
chalkdust crossnumber
means
routes
crosswords
rectangles
range
averages
tournaments
mean
digital clocks
functions
dominos
advent
ave
neighbours
arrows
clocks
menace
lists
cubics
consecutive integers
graphs
sums
matrices
complex numbers
prime numbers
proportion
perimeter
prime factors
trigonometry
parabolas
square numbers
colouring
sequences
perfect numbers
doubling
surds
differentiation
quadratics
square grids
factors
cryptic crossnumbers
angles
ellipses
elections
3d shapes
christmas
dates
shapes
the only crossnumber
wordplay
planes
factorials
people maths
chess
algebra
decahedra
number
indices
sport
scales
games
fractions
odd numbers
chocolate
binary
polygons
consecutive numbers
triangles
balancing
medians
products
digits
bases
remainders
geometric mean
tiling
dodecagons
2d shapes
palindromes
logic
geometry
time
circles
median
pascal's triangle
xor
geometric means
taxicab geometry
squares
triangle numbers
cards
partitions
folding tube maps
dice
even numbers
unit fractions
spheres
sets
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